Meet Our Experts

Alexian Brothers Neurosciences Institute has attracted renowned professionals who specialize in neuropsychological disorders. Our expert neuropsychologists are trained at the nation’s top medical institutions and continue to instruct at or collaborate with leading area educational institutions.  

A clinical neuropsychologist is a professional within the field of psychology with expertise in the applied science of brain-behavior relationships. The clinical neuropsychologist uses psychological, neurological, cognitive, behavioral, and physiological principles, techniques, and tests to evaluate patients’ neurocognitive, behavioral, and emotional strengths/weaknesses and their relationships to normal and abnormal central nervous system functioning. This is a unique distinction from other professionals who may administer some of the same tests but do not have the expertise to interpret the results as precisely as a fellowship-trained, experienced neuropsychologist. It is not enough to know that a problem exists; it is critical to know why the problem exists in order to create an effective treatment plan. 

Brian Leahy, Ph.D., A.B.P.P., Director of Neuropsychology Services

Dr. Leahy is a licensed clinical psychologist and a fellowship-trained and board certified clinical neuropsychologist. He earned his Ph.D. in Clinical and Rehabilitation Psychology at the Illinois Institute of Technology and completed residency training in clinical neuropsychology at the University of Illinois College of Medicine. He is currently a clinical assistant professor in the Department of Psychiatry at the University of Illinois at Chicago.

Shelley Gremley, Ph.D.

Dr. Gremley is a licensed clinical psychologist and a fellowship-trained clinical neuropsychologist. She earned her Ph.D. in Clinical and Rehabilitation Psychology at the Illinois Institute of Technology, completed an internship in clinical neuropsychology at Rush University Medical Center, and completed residency training in clinical neuropsychology at the Medical College of Wisconsin.